[3:130-131] O you who believe, do not exact usury, twofold and severalfold. And fear God, so that you may prosper. * And fear the Fire that has been prepared for the disbelievers.
He has prohibited usury for His servants. Among this is the loaning of one thing, demanding twice as much in return, and asking from you seven hundred times its amount, ad infinitum. The allusion in it is that magnanimity does not suit mankind but rather is an attribute of the Real (s).
And fear the Fire that has been prepared for the disbelievers: According to the evidence of these words, the believer will not be chastised by it. If he is chastised by it for a time, he will not abide in it.